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-rw-r--r--kernel/include/linux/sunrpc/rpc_pipe_fs.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/kernel/include/linux/sunrpc/rpc_pipe_fs.h b/kernel/include/linux/sunrpc/rpc_pipe_fs.h
new file mode 100644
index 000000000..7f490bef9
--- /dev/null
+++ b/kernel/include/linux/sunrpc/rpc_pipe_fs.h
@@ -0,0 +1,137 @@
+#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
+#define _LINUX_SUNRPC_RPC_PIPE_FS_H
+
+#ifdef __KERNEL__
+
+#include <linux/workqueue.h>
+
+struct rpc_pipe_dir_head {
+ struct list_head pdh_entries;
+ struct dentry *pdh_dentry;
+};
+
+struct rpc_pipe_dir_object_ops;
+struct rpc_pipe_dir_object {
+ struct list_head pdo_head;
+ const struct rpc_pipe_dir_object_ops *pdo_ops;
+
+ void *pdo_data;
+};
+
+struct rpc_pipe_dir_object_ops {
+ int (*create)(struct dentry *dir,
+ struct rpc_pipe_dir_object *pdo);
+ void (*destroy)(struct dentry *dir,
+ struct rpc_pipe_dir_object *pdo);
+};
+
+struct rpc_pipe_msg {
+ struct list_head list;
+ void *data;
+ size_t len;
+ size_t copied;
+ int errno;
+};
+
+struct rpc_pipe_ops {
+ ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
+ ssize_t (*downcall)(struct file *, const char __user *, size_t);
+ void (*release_pipe)(struct inode *);
+ int (*open_pipe)(struct inode *);
+ void (*destroy_msg)(struct rpc_pipe_msg *);
+};
+
+struct rpc_pipe {
+ struct list_head pipe;
+ struct list_head in_upcall;
+ struct list_head in_downcall;
+ int pipelen;
+ int nreaders;
+ int nwriters;
+#define RPC_PIPE_WAIT_FOR_OPEN 1
+ int flags;
+ struct delayed_work queue_timeout;
+ const struct rpc_pipe_ops *ops;
+ spinlock_t lock;
+ struct dentry *dentry;
+};
+
+struct rpc_inode {
+ struct inode vfs_inode;
+ void *private;
+ struct rpc_pipe *pipe;
+ wait_queue_head_t waitq;
+};
+
+static inline struct rpc_inode *
+RPC_I(struct inode *inode)
+{
+ return container_of(inode, struct rpc_inode, vfs_inode);
+}
+
+enum {
+ SUNRPC_PIPEFS_NFS_PRIO,
+ SUNRPC_PIPEFS_RPC_PRIO,
+};
+
+extern int rpc_pipefs_notifier_register(struct notifier_block *);
+extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
+
+enum {
+ RPC_PIPEFS_MOUNT,
+ RPC_PIPEFS_UMOUNT,
+};
+
+extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
+ const unsigned char *dir_name);
+extern int rpc_pipefs_init_net(struct net *net);
+extern void rpc_pipefs_exit_net(struct net *net);
+extern struct super_block *rpc_get_sb_net(const struct net *net);
+extern void rpc_put_sb_net(const struct net *net);
+
+extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
+ char __user *, size_t);
+extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);
+
+struct rpc_clnt;
+extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
+extern int rpc_remove_client_dir(struct rpc_clnt *);
+
+extern void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh);
+extern void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo,
+ const struct rpc_pipe_dir_object_ops *pdo_ops,
+ void *pdo_data);
+extern int rpc_add_pipe_dir_object(struct net *net,
+ struct rpc_pipe_dir_head *pdh,
+ struct rpc_pipe_dir_object *pdo);
+extern void rpc_remove_pipe_dir_object(struct net *net,
+ struct rpc_pipe_dir_head *pdh,
+ struct rpc_pipe_dir_object *pdo);
+extern struct rpc_pipe_dir_object *rpc_find_or_alloc_pipe_dir_object(
+ struct net *net,
+ struct rpc_pipe_dir_head *pdh,
+ int (*match)(struct rpc_pipe_dir_object *, void *),
+ struct rpc_pipe_dir_object *(*alloc)(void *),
+ void *data);
+
+struct cache_detail;
+extern struct dentry *rpc_create_cache_dir(struct dentry *,
+ const char *,
+ umode_t umode,
+ struct cache_detail *);
+extern void rpc_remove_cache_dir(struct dentry *);
+
+extern int rpc_rmdir(struct dentry *dentry);
+
+struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
+void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
+extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
+ struct rpc_pipe *);
+extern int rpc_unlink(struct dentry *);
+extern int register_rpc_pipefs(void);
+extern void unregister_rpc_pipefs(void);
+
+extern bool gssd_running(struct net *net);
+
+#endif
+#endif